![]() Having tested and serviced 1000’s of GDI Injectors from all the various injector manufacturers, we believe that our knowledge and experience in this market in over 60 countries and over 10,000 users worldwide gives us the authority to educate the inexperienced in the process of ASNU Injector Diagnostics. When testing GDI Injectors on an AFTERMARKET vehicle, understanding what is important about the injector’s performance and its relation to the correct running and performance of the cars engine, for those without experience and education on GDI injectors always believe you must test at systems pressure.ĪSNU have been testing and servicing GDI injectors since 1998. ![]() The injector was replaced and the problem no longer existed. We ultrasonically cleaned the injector again but the “misfire” remained our recommendation was that the injector was replaced. Given that these injector can operate at a 60:1 Air Fuel Ratio, even this slight difference will make a big difference in the combustion chamber.Īs these were tested at high pressure and you cannot rotate the injectors at that pressure (very dangerous) it’s possible that the “misfire” was not visible or that it is not easy to see at high pressure because of the high atomisation. The customer (in Europe) sent them to us for testing and we examined them thoroughly and there was no apparent problem, but when we rotated the number 1 injector, we saw the spray pattern changing with a split and a slight jetting as it split. These are for all BMW N54, N63 and N74 Engines. Siemens VDO Continental PCR 2.3 fuel injector design This type of fuel injectors operate at injection pressures not exceeding 160 MPa 20. True Used but remanufactured and tested at actual pressure using the same service we offer for cleaning and flow testing. Remanufactured OEM Siemens VDO 1353-7585261 Index 12. A few days later the customer returned complaining of the same problem and sure enough the system registered misfires. BMW Index 12 Siemens VDO Piezoelectric 1353-7585261. The customer fitted them back to the engine, entered the injector codes, cleared the fuel trim register and fault codes and sent the car out. SIEMENS PIEZO INJECTORS MANUAL FOR DESASSEMBLY REPAIRING AND REASSEMBLY Manuale DX.MT0010.03.10 Iniettori Siemens Piezo Ditex Technologies. The customer did tell the workshop what the problem was and they gave them a clean bill of health after servicing and they came back as OK. ![]() These had been checked on a high pressure system and passed as OK. The customer complained of a misfire registering on the system – according to the customer it had something like 600 registered. This is a video of our ASNU Injector Diagnostics Programme in action with some Siemens Piezo injectors. ![]()
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